Cole Miller died after a one-punch attack in Brisbane's Fortitude Valley on January 3.

"We believe these are sensible changes that will see a reduction in the number of assaults that we have and it is based on strong evidence of changes that have occurred elsewhere in this country and also overseas," Ms D'Ath said.

Mr Miller, 18, died of massive brain injuries in the Royal Brisbane and Women's Hospital on Monday, just more than 24 hours after an allegedly unprovoked coward punch in an inner-city nightclub precinct.

Ms D'Ath said Mr Miller's death was a tragic reminder of the consequences of alcohol-fuelled violence.

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"No parent ever wants to get the news about their child dying at the hands of a violent incident," she said.

Armstrong Renata and Daniel Jermaine Lee Maxwell were both charged with causing grievous bodily harm and remanded in custody following the alleged assault.

The charges against them were upgraded to unlawful striking causing death late on Monday afternoon.

The law was introduced by the former Newman government specifically to target one-punch deaths, after a string of similar tragedies in entertainment precincts across Australia.

The charge mirrors manslaughter but removes the "accident" defence.and carries a maximum sentence of life imprisonment.

Our Nightlife Queensland secretary and Fortitude Valley Liquor Accord chairman Nick Braban, who has campaigned strongly against the proposed legislation, said the aftermath of Mr Miller's death was not the time to push the government's agenda.

"I'm surprised the government would be drawing those analogies without the full detail of what's actually occurred coming to light yet in the court and from the police," he said.

"Until those facts are clear, I think it's a bit irresponsible to be making any statements about these things and we should do it at a time when the family has had time to come to terms with this tragedy."

Mr Braban said the community in the Valley was "blown away" by what had happened to Mr Miller.

"We've had a fantastic holiday season with no major incidents and we had a great year," he said.

"Then, a couple of days into the new year, for this to happen is really sad for the community and this place is a community.

"We're really feeling it and our thoughts and prayers are with the Miller family at this time."